component
FMMT591ATA
Public Made by Adomby adom
Diodes Incorporated Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownFMMT591ATA
Diodes Incorporated · Bipolar (BJT) · SOT-23
FMMT591ATA from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | B | input | Base of the PNP transistor; Base-Emitter turn-on VBE(on) max -1.0V at IC = -1A, VCE = -5V, and VEBO is limited to -7V. |
| 2 | E | passive | Emitter of the PNP transistor; continuous collector current is limited to IC = -1A (peak ICM = -2A). |
| 3 | C | passive | Collector of the PNP transistor (single lead on one side of the package); VCEO = -40V, VCBO = -40V, with IC = -1A continuous. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Collector-Base Breakdown Voltage | BVCBO | -40 | V | IC = -100μA | 4 | ||
| Collector-Emitter Breakdown Voltage | BVCEO | -40 | V | IC = -10mA | 4 | ||
| Emitter-Base Breakdown Voltage | BVEBO | -7 | V | IE = -100μA | 4 | ||
| Collector Cutoff Current | ICBO | -100 | nA | VCB = -30V | 4 | ||
| Collector-Emitter Cutoff Current | ICES | -100 | nA | VCES = -30V | 4 | ||
| Emitter Cutoff Current | IEBO | -100 | nA | VEB = -5.6V | 4 | ||
| Collector-Emitter Saturation Voltage | VCE(sat) | -200 | mV | IC = -100mA, IB = -1mA | 4 | ||
| Collector-Emitter Saturation Voltage | VCE(sat) | -350 | mV | IC = -500mA, IB = -20mA | 4 | ||
| Collector-Emitter Saturation Voltage | VCE(sat) | -500 | mV | IC = -1A, IB = -100mA | 4 | ||
| Base-Emitter Saturation Voltage | VBE(sat) | -1.1 | V | IC = -1A, IB = -100mA | 4 | ||
| Base-Emitter Turn-On Voltage | VBE(on) | -1 | V | IC = -1A, VCE = -5V | 4 | ||
| Static Forward Current Transfer Ratio | hFE | 300 | IC = -1mA, VCE = -5V | 4 | |||
| Static Forward Current Transfer Ratio | hFE | 250 | IC = -500mA, VCE = -5V | 4 | |||
| Static Forward Current Transfer Ratio | hFE | 160 | IC = -1A, VCE = -5V | 4 | |||
| Static Forward Current Transfer Ratio | hFE | 30 | IC = -2A, VCE = -5V | 4 | |||
| Transition Frequency | fT | 150 | MHz | VCE = -10V, IC = -50mA, f = 100MHz | 4 | ||
| Output Capacitance | Cobo | 10 | pF | VCB = -10V, f = 1MHz | 4 | ||
| Collector-Base Voltage | VCBO | -40 | V | 2 | |||
| Collector-Emitter Voltage | VCEO | -40 | V | 2 | |||
| Emitter-Base Voltage | VEBO | -7 | V | 2 | |||
| Continuous Collector Current | IC | -1 | A | 2 | |||
| Peak Pulse Current | ICM | -2 | A | 2 | |||
| Base Current | IB | -200 | mA | 2 | |||
| Peak Base Current | IBM | -1 | A | 2 | |||
| Power Dissipation | PD | 500 | mW | Note 6: collector lead on 15mm x 15mm 1oz copper, single-sided 1.6mm FR4 | 2 | ||
| Thermal Resistance, Junction to Ambient | RθJA | 250 | °C/W | Note 6: collector lead on 15mm x 15mm 1oz copper, single-sided 1.6mm FR4 | 2 | ||
| Thermal Resistance, Junction to Lead | RθJL | 197 | °C/W | Note 7: junction to solder-point (end of collector lead) | 2 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -55 | 150 | °C | 2 | ||
| Electrostatic Discharge - Human Body Model | ESD HBM | 4000 | V | JEDEC Class 3A (Note 8) | 2 | ||
| Electrostatic Discharge - Machine Model | ESD MM | 400 | V | JEDEC Class C (Note 8) | 2 |
CAD (KiCad official)
- Symbol:
FMMT591ATA - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
fmmt591ata-etched.step/fmmt591ata-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);fmmt591ata.step/fmmt591ata.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (7 pp, sha256
0c9f02ed07d07002, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).